[ 4.386958] ------------[ cut here ]------------ [ 4.387033] refcount_t: underflow; use-after-free. [ 4.387086] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 4.387156] Modules linked in: [ 4.387191] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 4.387264] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 4.387314] Workqueue: netns cleanup_net [ 4.387353] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 4.387397] Code: 9f e8 e8 54 ba ff 90 0f 0b 90 90 c3 80 3d 00 e6 2b 01 00 75 89 c6 05 f7 e5 2b 01 01 90 48 c7 c7 f8 48 35 9f e8 c5 54 ba ff 90 <0f> 0b 90 90 c3 80 3d db e5 2b 01 00 0f 85 62 ff ff ff c6 05 ce e5 [ 4.387557] RSP: 0018:ffffa98680067d50 EFLAGS: 00010286 [ 4.387600] RAX: 0000000000000000 RBX: ffffa98680067d60 RCX: 00000000ffffdfff [ 4.387659] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 4.387713] RBP: ffffa98680067858 R08: ffffffff9fb5ba28 R09: 00000000ffffdfff [ 4.387775] R10: ffffffff9fa7ba40 R11: ffffffff9fb2ba40 R12: dead000000000122 [ 4.387829] R13: 00000000fffb7cc2 R14: 0000000000000001 R15: ffff97044534a000 [ 4.387902] FS: 0000000000000000(0000) GS:ffff9704de991000(0000) knlGS:0000000000000000 [ 4.387966] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4.388017] CR2: 00005603b8a7dff0 CR3: 000000000681a002 CR4: 0000000000772ef0 [ 4.388079] PKRU: 55555554 [ 4.388102] Call Trace: [ 4.388123] [ 4.388146] netdev_run_todo+0x21a/0x550 [ 4.388186] ops_undo_list+0x1e3/0x1f0 [ 4.388225] cleanup_net+0x1b7/0x300 [ 4.388258] process_one_work+0x162/0x380 [ 4.388295] worker_thread+0x299/0x3c0 [ 4.388334] ? rescuer_thread+0x4c0/0x4c0 [ 4.388367] kthread+0x101/0x1f0 [ 4.388402] ? kthreads_online_cpu+0x110/0x110 [ 4.388447] ? kthreads_online_cpu+0x110/0x110 [ 4.388517] ret_from_fork+0x11c/0x140 [ 4.388555] ? kthreads_online_cpu+0x110/0x110 [ 4.388604] ret_from_fork_asm+0x11/0x20 [ 4.388638] [ 4.388655] ---[ end trace 0000000000000000 ]---